Describes how to troubleshoot wireless configuration issues on Cisco ISR 1000 series routers.
To ensure successful connection of an access point to the Cisco Mobility Express virtual controller or the Embedded Wireless Controller (EWC).
This guidance applies when a Cisco Mobility Express-enabled or EWC-enabled access point fails to establish a connection to the Cisco ISR 1000 Series Router's wireless controller.
The primary reason for this connectivity failure is the absence of an active DHCP server within the management VLAN that is assigned to the Wlan-GigabitEthernet interface. Without an IP address dynamically assigned by a DHCP server, the access point cannot communicate with the controller.
If a DHCP server is not configured in the appropriate VLAN, the access point will remain unable to connect to the wireless controller, thereby preventing wireless client connectivity through that access point.
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Configure a DHCP Server: Ensure a DHCP server is configured and active within the native VLAN of the WiFi module. This server must be capable of assigning IP addresses to the access points.
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Verify WLAN Module VLAN Configuration: Confirm that the management interface of the WLAN module is correctly assigned to a specific VLAN that has access to the DHCP server and other necessary network services (e.g., RADIUS).